水库桥墩冰荷载效应与防护措施  

Ice Load Effect of Reservoir Piers and Protective Measures

作　　者：郭威 GUO Wei(Beijingxi Track Maintenance Depot,China Railway Beijing Group Co Ltd,Beijing 102300,China)

机构地区：[1]中国铁路北京局集团有限公司北京西工务段,北京102300

出　　处：《中国铁路》2022年第5期138-144,共7页China Railway

摘　　要：针对水库冰冻期桥墩存在的冰害问题,以丰沙铁路落坡岭桥梁为研究对象,采用理论计算和现场试验对比分析的方法,利用有限元数值模拟软件,分析桥墩受力情况。结合实际情况,提出安装船头式“破冰体”结构装置进行防护,并对其有效性进行了现场验证。通过现场应用,破冰体与桥墩形成了一个整体防护,减小了桥墩受力,能够有效避免桥墩受上游冰排挤压力作用而发生的开裂破坏问题,消除了铁路工务部门人工破冰作业存在的安全风险,节约了维修用工。研究成果对类似水库冰冻期桥墩的冰害分析及措施防护具有较高的推广价值和借鉴意义。To analyze the ice damage problems to piers during freeze-up of the reservoir,the Luopoling Bridge of Fengtai-Shacheng Railway is taken as the research object.A comparative analysis of theoretical calculations and field tests is used to analyze the forces on the bridge piers using finite element numerical simulation software.According to the actual situation,the nose-type“ice apron”structural device is proposed for protection,which has been subject to field validation for its effectiveness.Through field application,the ice apron and the pier form an integral protection structure,which reduces the stress on the pier,effectively avoids the cracking damage of the pier due to the extrusion force from upstream ice floe,eliminates the safety hazards existing in the manual ice-breaking operation of the railway track maintenance department,and reduces maintenance labor demands.The research results have high spreading value and reference significance for the similar ice damage analysis and protective measures of reservoir piers during the freeze-up.

关 键 词：丰沙铁路 铁路桥梁 水库桥墩 冰害 有限元 对比分析 防护措施 

分 类 号：U447[建筑科学—桥梁与隧道工程]